Filled-bag-closing apparatus



Feb. 3, W31, F. LUTZ 1 791 4319 FILLED BAG CLOSING APPARATUS Filed Oct. 25, 1926 2 Sheets-Sheet l Feb. 3, 1931. r F. LUTZ 1,791,419

FILLED BAG CLOSING APPARATUS Filed Oct. 25, 1926 2 Sheets-Sheet 2 Patented Feb. 3, "1931 UNITED STATES FRIEDRICH LUTZ,

PATENT OFFICE FILLED-BAG-CLOSING APPARATUS Application filed October 25, 1926, Serial 110 The invention relates to new and useful improvements in a filled bag closing apparatus, and more particularly to the means for actuating and for stopping the operated parts in the apparatus.

An ob 'ect of the invention is to provide means whereby a brake may be applied to the driven member which actuates the sewing head. and also a brake applied to the driven member which actuates the conveyor when these driven members are disconnected from the driving members which operate the same during the stitching and "closing of the bag.

A further object of the invention is to provide an apparatus of the above character wherein the driving members may be con- .nected in succession to the driven members operates the sewing head and the brakes applied to the driven members in succession when the driving members are disconnected from said driven members.

A still further object of the invention is to provide a brake for the driven member which 7 which is formed so that said brake may be first applied to the driven member for the sewing head to insure a quick stopping of the same prior to the applying of the brake to the driven member which operates the conveyor.

In the drawings which show by way of illustration one embodiment of the invention:

Fig. 1 is a side view showing a machine I having the improvements embodied therein.

Fig. 2 is a view partly in vertical section and partly in side elevation showing on an enlarged scale the manually controlled means for starting and stopping the apparatus.

The invention is directed particularly to an apparatus for closing a filled bag and includes a conveyor for conveying the filled bags, and a sewing head which overhangs the conveyor for stitching and closing the bag. The conveyor is operated-by a train of de- Jvices including a'driven' member. The sew- Jing'head is likewise operated bya train of devices including a driven member. The actuating mechanism for the apparatus includes "a driving member for each driven member,

T and manually controlled means is providedfor connecting said driving members to their 144,075, and in Germany November 5, 1925.

associated driven members and for disconmeeting the driving members therefrom.

The invention is only directed particularly to a braking mechanism which includes a brake for each driven member, and these brakes are so connected with the manually controlled means which connects and disconnects the driving and driven members, that .a brake is applied to each driven member when the driving members are disconnected therefrom. Prior to my invention it was found that in closing filled bags the sewing head has such momentum as'to make a series of stitches after the conveyor has stopped.

- This is waste of thread and the present im- .framework so as to overhang the side face thereof. This sewing head is capable of vertical adjustment by the aid of a threaded shaft 2 and the hand crank 3. A belt wheel 4 of the sewing head is connected by a belt 5 to a belt wheel 6 on the shaft 7. This shaft 7 is the driven shaft which operates the sewinglhead.

ocated beneath the sewing head and at one side of the main portion of the frame is a conveyor belt 9 which runs over belt pulleys 8. Mounted in the frame is a vertical shaft 10 which is connected by a'suitable gearing mechanism located in the housing 11 to the shaft car 'ng the belt ulley 8, so that when the sha 10 is rotated is rotated and the conveyor operated. The shaft 10 is the driven shaft which actuates the conveyor. The actuating mechanism for operating the sewing-headand the conveyor may consist of any suitable driving device, but as shown in the drawings, an electric motor 12 is employed. This electric motor 12 is connected through suitable devices with a the belt pulley ferred to hereinafter as the driven member, while the member 13 has one face thereof adapted to engage with this clutch pulley 14 when the pulley 13 is moved endwise on the shaft 10, and therefore this driving pulley 13 1s referred to as the driving member.

Mounted on the upper end of the shaft 10 and fixed thereto is a clutch pulley 15 having an inclined or tapered face. Mounted on the lower end of the shaft 7 is a clutch pulley 16 which is adapted to be engaged by the clutch pulley 15. This clutch pulley 16 is hereinafter referred to as a'driven member and is the driven member which operates the sewing head. The driven member 14 through the shaft 10 operates the conveyor. When the belt pulley 13 is connected to the driven member 14, it not only actuates the shaft 10, but through the shaft 10 actuates the driving member 15 for the sewing head. These parts are of the usual construction in a filled ag sewing apparatus and further description thereof is not thought necessary.

Pivoted at 21 to a bracket attached to the main frame is a control lever 22. This control lever 22 is connected by a link 19 to a treadle pivoted at 18 and manually operated by a. foot member 17. A spring 20 normally holds the outer end of the control lever raised. The inner end of this control lever 22 is forked so as to engage pins 23 carried by a collar 24 located between spaced guards attached to a. sleeve which is connected with the belt pulley 13. When the control lever is depressed the belt pulley 13 is moved upwardly until it is brought into engagement with the driven member 14. Then the entire shaft 10 is lifted until the driving member 15 engages the driven member 16. Thus it is that the driving members are caused to engage the driven members in succession, first starting the conveyor and'then starting the sewing mechanism. When this control lever is released the driving members will be disconnected from the driven members in succession, the driven member for the sewing head being first released and then the driven member for the conveyor. Particularly in such an arrangement the sewing head is likely to continue in motion and make unnecessary chain loops which would waste thread and therefore I have rovided a braking member not only for the riven member connected to the conveyor, but also for the driven member connected to the sewing head.

Mounted on the upper part of the frame of the machine is a rock frame 25. This rock' frame is connected by a link 26 to the control lever 22. The lower end of the link is slotted at 31 and a bolt 32 passing through the slot connects the link to the control lever. Mounted on this rock frame 25 is a brake 28. The brake is in the form of a braking shoe carried by a rod mounted in a housing 29. A spring 30 forces the brake shoe to ward the right as viewed in Fig. 2 and nuts 33 limit the endwise movement of the rod.

The controlling lever 22 has an upwardly extending arm 34 and adj ustably mounted in this arm is a bracket member 35 carrying a brake shoe 27. The brake shoe 27 is adapted to engage the driven member 14 and the brake shoe 28 is adapted to engage the driven memconnecting and disconnecting the sewing head and the conveyor to an actuating means therefor which is under the action of a single control means. When this control means is moved in one direction first the driving member for the conveyor is connected to the driven member therefor and then the driving member for the sewing head is connected to the driven member therefor. The structure is such that these parts can operate in succession and not simultaneously, and therefore, the sewing head may be released first after which the conveyor may be actuated. This is quite important, as the conveyor is used to convey the bag to be closed to the stitching point before the stitching mechanism is set into operation and also for conveying the bag away from the stitching point after the bag has been closed. It is very essential that in a combination such as set forth, the brakes shall also be applied in succession. The housing including the spring for the brake 28serves as a yielding support for this brake; therefore this brake for the driven member connected to the sewing head may be so set that when the parts are shifted for disconnecting the sewing head and conveyor from the actuating means therefor, the brake will be applied to'the driven member for the sewing head and stop the same while the driven member for the conveyor is free and may be actuated for driving the conveyor. A further movement of this same controlling member will, however, cause the brake to be applied to the driven member for the conveyor and at this time the spring yields to permit a movement of the parts sufficient to apply the brake.

What is claimed as new is:

1. A filled bag sewing apparatus comprising a traveling conveyor, a driven member for operating said conveyor, a sewing head, a driven member-for operating said sewing head, actuating means including a driving member for each driven member, manually controlled means for connecting in succession the driving member and the driven member forthe conveyor and the driving member and the driven member for the sewing head and for releasing said members, a brake for the driven member for the conveyor actuated by a shifting of the manually controlled means for releasing the driving member from said driven member, and a brake for the driven member for the sewing head operated by said manually controlled means for disconnecting the driving member from said last-named driven member, said brake for the driven member of the sewing head being yieldingly mounted whereby the same may be applied to the sewing head for stopping the same and by a continued movement of the manually controlled means the brake applied to the driven member for the conveyor. 2. A filled b'ag sewing apparatus compris ing a traveling conveyor, a driven member for operating said conveyor, a sewing head, a driven member for operating the sewing head, actuating means including a driving member for each driven member, braking means including a brake for each driven member, and manually controlled means for connecting and disconnecting in succession the driving member and driven member for the conveyor and the driving member and driven member for the sewing head and for applying in succession the brake for so the driven member for the sewing head and the brake for-the driven member for the conveyor when said driven members are disconnected from the driving members therefor, said means for applying the brake to the driven member for the sewing head including a rock frame and housing at the upper end thereof, a rod passin through the housing and carrying a bra e shoe, a spring yieldingly pressing the brake shoe toward the driven member, and means for limiting the movement of the brake shoe relative to the housing. a

In testimony whereof, I aflix my signature.

FRIEDRICH LUTZ. 

